turbot

After Salman Rushdie's visit to our town, I've taken up Satanic Verses for another try. Early on, I've come across the phrase like a 'disgusted turbot', and realized that I have absolutely no idea what a turbot is. I realize that the way I've glossed it so far in life is to try to fit it into a sentence without caring about it, so in this case I would try tureen and turnip as general associations, without stopping to ask whether it makes sense. This one is a stumper. Online dictionary, please enlighten me.

It is a European flatfish, highly prized as food.

Why do I have the feeling of 'Oh, yes--of course'?

Like I was ever going to come up with this.

I still don't have any idea how a turbot looks disgusted.